Failure of universal finite-size scaling above the upper critical dimension
X.S. Chen and
V. Dohm
Physica A: Statistical Mechanics and its Applications, 1998, vol. 251, issue 3, 439-451
Abstract:
Previous theories have predicted that O(n) symmetric systems in a finite cubic geometry with periodic boundary conditions have universal finite-size scaling functions near criticality in d>4 dimensions. On the basis of exact results for the O(n) symmetric ϕ4 model in the large n limit we show that universal finite-size scaling does not hold in the predicted form because of significant cut-off and lattice effects for d>4. It is shown that finite-size scaling is valid with two reference lengths which turn out to be identical with the amplitudes of the bulk correlation length. For the ϕ4 field theory the finite-size scaling functions are shown to be non-universal, i.e., to depend explicitly on the cut-off and on the bare four-point coupling constant, whereas for a ϕ4 lattice model the finite-size scaling functions have a different form that is independent of the lattice spacing and the four-point coupling constant.
Keywords: Finite-size scaling; ϕ4 field theory; Universality (search for similar items in EconPapers)
Date: 1998
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:251:y:1998:i:3:p:439-451
DOI: 10.1016/S0378-4371(97)00688-2
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